For me creepers have gotten sneaky. I was walking around after a night of hunting mobs when I saw a creeper. I began walking up to it, waiting for it to follow me, but it just kept ignoring me. Once I got within range, it began to hiss, but since still refused to look at me, it took me too long to realize that it was hissing and it killed me, not once actually seeming to notice me.
They tend to track you through walls or glass a lot more than before. I've noticed this with skeletons and creepers, while nearby zombies will just continue to wander around, and only come at you if they are facing you.
Of course, spiders have always had the ability to track you through walls, ever since they could climb them.
This would be glorious...
Of course, spiders have always had the ability to track you through walls, ever since they could climb them.